Butanol is the oft-ignored orphan of the biofuel world, but it's getting some attention down south. Scientists in New Orleans think that waste from zoo animals might be just the ticket to making the fuel for automobile use. Researchers form Tulane University aren't looking to turn the animal feces itself into fuel, but are investigating the waste product of plant-eating animals in the zoo to see what bacteria are involved in breaking down cellulose inside the animal. These bacteria, which would